NPCs composing that spawngroup :

a_grimling_cadaverist (20%)

a_grimling_deathbringer (20%)

a_grimling_dreamspinner (20%)

a_grimling_manacrafter (20%)

a_war_painted_skullcracker (20%)

NPCs spawning around that spawngroup :
(Max range : 100)

a_grimling_cadaveris_1432329, range=31 (-208,-451,3)

a_grimling_cadaverist (2%)

a_possessed_corpse_1432313, range=61 (-253,-447,3)

a_possessed_corpse (2%)
a_possessed_corpse (2%)

a_grimling_deathbrin_1432259, range=50 (-174,-466,3)

a_grimling_deathbringer (2%)

a_grimling_deathbrin_1432258, range=52 (-248,-434,5)

a_grimling_deathbringer (85%)
a_grimling_ritualist (15%)

a_grimling_deathbrin_1432257, range=68 (-251,-463,3)

a_grimling_deathbringer (2%)

a_grimling_manacraft_1432231, range=93 (-142,-345,-18)

a_grimling_manacraft_1432230, range=94 (-159,-507,-4)

a_grimling_manacraft_1432229, range=87 (-179,-335,-19)

a_grimling_manacraft_1432224, range=97 (-260,-496,-4)

a_grimling_fire_eater (2%)
a_grimling_manacrafter (2%)

acrylia1232095, range=99 (-124,-354,-17)